Windows 10 audio _never_ works properly
On one machine over the last 2 years I've had:
Forgets that it has an internal audio out so you can only send audio over HDMI
Forgets that it can send audio over HDMI so you can only use the headphone out.
Turns the sound of everything else down during a skype call and then never turns it back up.
Boots with *no audio devices at all* in the "modern" audio ui - but still actually has sound on all of them - you just can't control them.
Routes multi-point audio massively incorrectly - left becomes centre, centre becomes rear-right, rear-left becomes a mix of other channels etc.
Sometimes these problems change during a single session when some program that was playing sound takes a dirt nap and somehow takes out the underlying audio subsystem - which when restarted now has different problems than it had before the crash...
I've honestly no idea how they managed to get this so wrong since running Windows 7 on the same machine I never had any of these problems.